<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <link rel="stylesheet" href="bootstrap-5.3.0-dist/css/bootstrap.min.css">
  </head>
  <body>
    <div class="container">
      <h4>.container类设置布局容器</h4>
    </div>
    <div class="container-fluid">
      <h4>.container-fluid类设置布局容器</h4>
    </div>
    <div class="container-sm">
      <h4>.container-sm类设置布局容器</h4>
    </div>
  </body>
</html>
